Wltapping machine



pR'iB y A. TERKELSEN WRAPPING MACHINE Filed May 9, 1923 2 Sheets-Sheet l LY/MM pn l5 1924.

A. TERKELSEN WRAPPING MACHINE Filed May 9, 1923 2 Sheets-Sheet 2 I@ EN l-n Y WM@ ML, MQ/5 Patented Apr. l5, 1924.

lTED STTES ANDREW TERKELSEN, F BOSTON, MASSACHUSETTS.

PING MACHINE.

Application filed May 9, 1923. Serial No. 637,682.

To all whom t may concer/n.:

Be it known that I, ANDREW TERKELSEN, a citizen of the United States, residing at Boston, county of Suffolk, State of Massachusetts, have invented a certain newy and useful Improvement in Wrapping Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to wrapping ma.- chines of the general type shown and described in an application for Letters Patent, filed June 21, 1921 by George W. Prouty, Serial No. 479,410, and adapted primarily for wrapping annular objects, such, for example, as automobile tires, coils of wire, etc.

A machine of this type comprises a work support by which the object to be wrapped is gradually turned, an annular shuttle which is rotated about the work as the latter is moved therethrough, a reel or the like removed fromthe shuttle for supplying to the latter wrapping naterialin the form of a continuous strip which is wrapped about the shuttle as the latter is `rotated to wrap said 'strip about the work, and means between the shuttle land the source of supply for severin the' strip of wrapping material after a su cient quantity thereof has been wrapped upon the shuttle to complete the wrapping of a given object.

The present Invention has for its object to provide means associated with-the reel, whereby the latter, after the operation of the cutting mechanism, is adapted to rewind such portion of the wrapping material as may have been unwound therefrom by m0- mentum or otherwise but which is not needed for the wrapping operation then in progress of completion.

The foregoing and other objects of the invention, together with means whereby the same may be carried into effect, will best be understood from the following description of one form or embodiment thereof illustrated in the accompanying drawings. It will be understood, however, that the particular construction and arrangement described and shown have been chosen for illustrative purposes merely, and that the invention, as defined by the claims hereunto appended, may be otherwise practised without departure from its spirit and scope.

In said drawings:

Fig. 1 is a front elevation of the complete machine.

Fig. 2 is an enlarged section taken substantially on line 2 2, Fig. 1, showing the reel rewind construction.

Fig. 3 is a section taken substantially on the l1ne 3-3, Fig. 2, showing the location and attachment of the rewind spring within the reel.

The frame of the machine comprises a base and a yoke 16 which is pivotally mounted on a shaft 17 journalled in an upright 18 rising from' the basel. The yoke 16 is provided with guide rollers 19 for an annular shuttle 20 which is rotated by a driving meinberlin the form of a( friction disk 21 secured to the shaft 17 and-driven through connections (not shown in detail) under the control of a starting treadle 22 from an electric motor 23. The tire or other work AW to be wrapped is held by a weighted roller 14 upon work supporting rollers 24 (only one of which is shown in Fig.,1) which are driven through connections generally indicated at 25 from the motor 23, the arrangement being such that the work W will be turned relatively slowly with respect to the speed of rotation of the shuttle 20. Said shuttle is formed with a hinged segment 26 normally closing a gap through which the work W may be inserted, while the yoke 16 may be adjusted about the axis of the shaft 17 to center the shuttle 20 with respect to annular objects .of different sizes, said yoke being counterbalanced by a spring 27 and being locked in adjusted position by means of a clamp 28 carried by an upright 29 rising from the base 15.

The wrapping material, preferably in the formh of a continuous strip S of paper, is supplied from a roll 30 supported by a reel (hereinafter described) carried by the yoke 16. Said paper passes from the roll 30 over a tension device 32, thence through a folding device designated asa Whole in Fi 1 by the numeral 33, and thence over a gui e plate 34 to the shuttle 20. Said shuttle 20 comprises an annulus having on one face a circular series of rollers 35 about which the strip S is wrapped whenthe shuttle is rotated, said strip being-fed from the shuttle about a guide roller 36 to the work W. Between the shuttle 20 and the source of supply 30 there is provided a cutting mechanisln comprising a knife 37 co-operating with'a portion of the guide plate 34 to sever the strip S when a suficient length thereof has been wound around the shuttle rollers 35 to complete the-wrapping of the work W. The knife 37 is automatically actuated, after a predetermined number of rotations of the driving disk 21, by a counting mechanism 38 actuated at each rotation of said drivingi diskvby a cam projection 39 thereon, sai counting mechanism being manually adjustable in accordance with the size of the articles wrapped.

From the foregoing, the nature, location, and functionof the parts referred to will be sufficiently understood for the purpose of the present case. With the exception of those hereinafter described, and in so far as the 'others enter into combination therewith, as

ointed out in the claims,l these parts are not involved in the present invention and may be of any suitable construction and arrangement.

Referring now to Fig. 2, the reel which supports the roll of wrapping material 30 comprises a sleeve rotatably mounted, as by means of anti-friction bearings 54, on a stud or spindle 51 projecting from the yoke 16, said sleeve being retained on said stud by a nut 53 on the end of the latter. A spiral spring 55 surrounds the stud 51 within the sleeve 50, and one end 56 thereof is secured to the sleeve 50, so that when the sleeve 50 is rotated about the stud 51 it will carry the spring 55 therewith. Said spring tapers toward its opposite end 57, so that a number of the convolutions thereof adjacent the end 57, are normally of smaller diameter than the stud 51. It will thus be seen that when the spring 55 isplaced on the stud 51, the

part above referred to will be expanded tov fit the said stud, and consequently will bear frictionally thereon when said spring is rotated thereon by the sleeve 50.

In operation, when the end of the strip of wrapping material -is drawn from the roll 30,'the sleeve 50 will be rotated about the stud 51, carrying 'therewith the end 56 of the spring 55, The frictional contact of the several convolutions of the said spring adj acent the end 57 will sufficiently resist this movement of the spring 55 to cause the end 56 thereof, to make a number of revolutions about the stud 51`before the end 57 begins to rotate. The spring is consequently placed under a torsional tension while the strip of wrapping material is being drawn from the roll 30. When suflicient wrapping material has been Wound on the shuttle, the automatic cutting mechanism operates to sever the strip. Due to the momentum of the reel, an additional amount of wrapping material will nevertheless be unwound before the reel is stopped, and the spring 55, being under tension, will then cause the sleeve 50 to rotate in the reverse direction, thereby rewinding a portion of the unwound material upon the roll 30.

What I claim is:

1. In a machine of the class described, in combination, wrapping mechanism, an automatic measuring and cutting device for the wrapping material, and a reel adapted to hold a roll of said wrapping material and having means to rewind a portion of said wrapping material previously unwound therefrom when said material is cut by said cutting device.

2. In a machine of the class described, a reel adapted to hold a roll of wrapping material to be fed to the work, said reel comprising a sleeve, a stud secured to the frame of said machine and on which said sleeve is rotatably mounted, and a spiral spring mounted on the stud within the sleeve, one

end of said spring being secured to the` sleeve and another part thereof being in frictional contact with the said stud, whereby said reel is .adapted to rewind a portion of said wrapping material previously unwind therefrom.

3. In a machine of the class described, a reel adapted to holda roll of wrapping material to be fed to the work, said reel comprising a sleeve, a stud secured to the frame of said machine and on which said sleeve is rotatably mounted, and a spiral spring -mounted on said stud within said sleeve, one

end of said spring being secured to the sleeve, and a plurality of convolutions thereof adjacent the other end being in frictional contact with said stud, :whereby said reel is adapted to rewind a portion of said wrapping material previously unwound therefrom.

In testimony whereof I atix my signature.

ANDREW TERKELSEN. 

